CREATE TABLE t1 (a INT NOT NULL) ENGINE=MyISAM;

INSERT INTO t1 VALUES (4),(7),(0);

CREATE TABLE t2 (b INT NOT NULL) ENGINE=MyISAM;

INSERT INTO t2 VALUES (1),(2);

CREATE TABLE t3 (c INT NOT NULL) ENGINE=MyISAM;

INSERT INTO t3 VALUES (4),(6),(3);

CREATE TABLE t4 (d INT NOT NULL) ENGINE=MyISAM;

INSERT INTO t4 VALUES (4),(5),(3);

CREATE TABLE tv (e INT NOT NULL) ENGINE=MyISAM;

INSERT INTO tv VALUES (1),(3);

CREATE ALGORITHM=TEMPTABLE VIEW v_temptable AS SELECT * FROM tv;

CREATE ALGORITHM=MERGE VIEW v_merge AS SELECT * FROM tv;

SELECT * FROM t1, t2 

WHERE a NOT IN ( SELECT e FROM t3 LEFT JOIN v_temptable ON (c = e) WHERE c <> b ) AND a < b;

SELECT * FROM t1, t2 

WHERE a NOT IN ( SELECT e FROM t3 LEFT JOIN v_merge ON (c = e) WHERE c <> b ) AND a < b;

WHERE a NOT IN ( SELECT e FROM t3 LEFT JOIN v_temptable ON (c = e) WHERE c <> b ) AND a < b;

a	b

SELECT * FROM t1, t2 

WHERE a NOT IN ( SELECT e FROM t3 LEFT JOIN v_merge ON (c = e) WHERE c <> b ) AND a < b;

a	b

0	1

0	2

index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on

EXPLAIN EXTENDED

SELECT * FROM t1, t2 

WHERE a NOT IN ( SELECT e FROM t3 LEFT JOIN v_temptable ON (c = e) WHERE c <> b ) AND a < b;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra

1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	

1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer (flat, BNL join)

2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3100.00	Using where

2	DEPENDENT SUBQUERY	<derived3>	ref	key0	key0	4	test.t3.c	2	100.00	Using where

3	DERIVED	tv	ALL	NULL	NULL	NULL	NULL	2	100.00	

Warnings:

Note	1276	Field or reference 'test.t2.b' of SELECT #2 was resolved in SELECT #1

Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where ((not(<expr_cache><`test`.`t1`.`a`,`test`.`t2`.`b`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `v_temptable`.`e` from `test`.`t3` left join `test`.`v_temptable` on((`v_temptable`.`e` = `test`.`t3`.`c`)) where ((`test`.`t3`.`c` <> `test`.`t2`.`b`) and ((<cache>(`test`.`t1`.`a`) = `v_temptable`.`e`) or isnull(`v_temptable`.`e`))) having <is_not_null_test>(`v_temptable`.`e`)))))) and (`test`.`t1`.`a` < `test`.`t2`.`b`))

EXPLAIN EXTENDED

SELECT * FROM t1, t2 

WHERE a NOT IN ( SELECT e FROM t3 LEFT JOIN v_merge ON (c = e) WHERE c <> b ) AND a < b;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra

1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	

1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer (flat, BNL join)

2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	3100.00	Using where

2	DEPENDENT SUBQUERY	tv	ALL	NULL	NULL	NULL	NULL	2100.00	Using where; Using join buffer (flat, BNL join)

Warnings:

Note	1276	Field or reference 'test.t2.b' of SELECT #2 was resolved in SELECT #1

Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where ((not(<expr_cache><`test`.`t1`.`a`,`test`.`t2`.`b`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`tv`.`e` from `test`.`t3` left join (`test`.`tv`) on((`test`.`tv`.`e` = `test`.`t3`.`c`)) where ((`test`.`t3`.`c` <> `test`.`t2`.`b`) and (<cache>(`test`.`t1`.`a`) = `test`.`tv`.`e`))))))) and (`test`.`t1`.`a` < `test`.`t2`.`b`))